syzkaller login: [ 42.352555] BUG: Bad rss-counter state mm:000000002aa57ded type:MM_FILEPAGES val:33 [ 42.353786] BUG: Bad rss-counter state mm:000000002aa57ded type:MM_ANONPAGES val:22 [ 42.527756] ================================================================== [ 42.528836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.530076] Read of size 8 at addr ffff888016ceb3f8 by task sshd/221 [ 42.531287] [ 42.531604] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.532843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.534100] Call Trace: [ 42.534489] [ 42.534831] dump_stack_lvl+0x91/0xf0 [ 42.535424] print_report+0xcc/0x620 [ 42.536023] ? __virt_addr_valid+0x102/0x340 [ 42.536694] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.537441] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.538191] kasan_report+0xbe/0xf0 [ 42.538760] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.539519] vma_interval_tree_remove+0xc75/0xec0 [ 42.540275] vma_prepare+0xc54/0x11a0 [ 42.540862] __split_vma+0x5af/0x950 [ 42.541441] ? __pfx___split_vma+0x10/0x10 [ 42.542084] ? find_held_lock+0x2c/0x110 [ 42.542713] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.543404] ? lock_is_held_type+0x9f/0x120 [ 42.544105] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.544849] ? mtree_range_walk+0x632/0x900 [ 42.545508] ? mas_walk+0x5c7/0x7c0 [ 42.546082] do_vmi_munmap+0x1f1/0x2b0 [ 42.546685] mmap_region+0x1f9/0x2660 [ 42.547281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.547911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.548793] ? __pfx_lock_acquire+0x10/0x10 [ 42.549454] ? __pfx_mmap_region+0x10/0x10 [ 42.550107] ? security_mmap_addr+0x7d/0xa0 [ 42.550751] ? get_unmapped_area+0x1f5/0x3f0 [ 42.551422] do_mmap+0x854/0xf00 [ 42.551988] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.552593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.553275] ksys_mmap_pgoff+0x3af/0x500 [ 42.553898] do_syscall_64+0x3f/0x90 [ 42.554479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.555268] RIP: 0033:0x7fa2d9408d82 [ 42.555827] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 42.558036] RSP: 002b:00007ffcec7f0db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.558902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2d9408d82 [ 42.559721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2d8842000 [ 42.560518] RBP: 00007fa2d8842000 R08: 0000000000000009 R09: 0000000000001000 [ 42.561310] R10: 0000000000000812 R11: 0000000000000206 R12: 000056355125dec0 [ 42.562108] R13: 00007ffcec7f0dd0 R14: 00007ffcec7f0e00 R15: 00007ffcec7f1160 [ 42.562919] [ 42.563200] [ 42.563406] Allocated by task 212: [ 42.563837] kasan_save_stack+0x22/0x50 [ 42.564330] kasan_set_track+0x25/0x30 [ 42.564801] __kasan_slab_alloc+0x59/0x70 [ 42.565304] kmem_cache_alloc+0x16b/0x370 [ 42.565795] vm_area_dup+0x20/0x160 [ 42.566234] __split_vma+0x170/0x950 [ 42.566696] split_vma+0xc6/0x110 [ 42.567140] mprotect_fixup+0x8d2/0xb30 [ 42.567645] do_mprotect_pkey+0x87e/0xd40 [ 42.568162] __x64_sys_mprotect+0x78/0xc0 [ 42.568673] do_syscall_64+0x3f/0x90 [ 42.569146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.569771] [ 42.569983] Freed by task 209: [ 42.570376] kasan_save_stack+0x22/0x50 [ 42.570871] kasan_set_track+0x25/0x30 [ 42.571452] kasan_save_free_info+0x2b/0x50 [ 42.571999] __kasan_slab_free+0x10a/0x190 [ 42.572524] kmem_cache_free+0x10d/0x4d0 [ 42.573036] rcu_core+0x8c8/0x2860 [ 42.573477] __do_softirq+0x1b7/0x7d4 [ 42.573948] [ 42.574163] Last potentially related work creation: [ 42.574745] kasan_save_stack+0x22/0x50 [ 42.575245] __kasan_record_aux_stack+0x8e/0xa0 [ 42.575815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.576454] remove_vma+0x139/0x170 [ 42.576895] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.577457] do_vmi_munmap+0x1f1/0x2b0 [ 42.577929] __vm_munmap+0x138/0x3a0 [ 42.578393] __x64_sys_munmap+0x59/0x80 [ 42.578883] do_syscall_64+0x3f/0x90 [ 42.579414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.580055] [ 42.580273] The buggy address belongs to the object at ffff888016ceb3a0 [ 42.580273] which belongs to the cache vm_area_struct of size 168 [ 42.581723] The buggy address is located 88 bytes inside of [ 42.581723] freed 168-byte region [ffff888016ceb3a0, ffff888016ceb448) [ 42.583125] [ 42.583348] The buggy address belongs to the physical page: [ 42.584032] page:00000000d44161d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ceb [ 42.585147] memcg:ffff88800d36ec01 [ 42.585574] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.586291] page_type: 0xffffffff() [ 42.586747] raw: 0100000000000200 ffff88800879fc80 ffffea0000252080 dead000000000005 [ 42.587682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d36ec01 [ 42.588604] page dumped because: kasan: bad access detected [ 42.589277] [ 42.589493] Memory state around the buggy address: [ 42.590083] ffff888016ceb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 42.590956] ffff888016ceb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 42.591838] >ffff888016ceb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 42.592714] ^ [ 42.593607] ffff888016ceb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 42.594629] ffff888016ceb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.595492] ================================================================== [ 42.596565] Disabling lock debugging due to kernel taint [ 44.925738] BUG: Bad rss-counter state mm:00000000557e4c69 type:MM_FILEPAGES val:33 [ 44.926640] BUG: Bad rss-counter state mm:00000000557e4c69 type:MM_ANONPAGES val:22 [ 45.515926] BUG: Bad rss-counter state mm:00000000a6a726da type:MM_FILEPAGES val:33 [ 45.517060] BUG: Bad rss-counter state mm:00000000a6a726da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48136' (ECDSA) to the list of known hosts. 2023/06/19 14:29:49 fuzzer started 2023/06/19 14:29:50 dialing manager at localhost:44161 2023/06/19 14:29:50 checking machine... 2023/06/19 14:29:50 checking revisions... [ 46.181027] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:29:50 testing simple program... [ 46.221478] cgroup: Unknown subsys name 'net' [ 46.270075] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:29:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d000c RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff88800c4e7950 RSP=ffff88800c4e7890 R8 =00000000800d000d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff88800844f780 R13=ffff88800e751390 R14=ffffea000039d440 R15=ffff88806ce3de00 RIP=ffffffff818072a6 RFL=00000082 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9c4d095900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9c4d64d0b0 CR3=0000000016868000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9e134f RDX=dffffc0000000000 RSI=ffffffff8118ddc3 RDI=ffff88806cf09a20 RBP=ffff88806cf09a78 RSP=ffff88806cf099b0 R8 =0000000000000001 R9 =ffff88806cf09a60 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09a80 R13=ffff88806cf09a68 R14=ffff88806cf09a61 R15=ffff88806cf09a20 RIP=ffffffff81130706 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f06e230c558 CR3=000000000c5f8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=3915b1e09af8ceb9374e015c5adf9759 XMM02=000000000011f2f8ec2efd57dc4c00df XMM03=00000000001237c81d66c9dd38673366 XMM04=22d1b1235d73f70700000000000ae988 XMM05=dfcdbad4f1609c370000000000133618 XMM06=806171799158d96700000000001334a0 XMM07=e042d86d42eb936e0000000000123a48 XMM08=1d66c9dd38673366000000000011f358 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000